多线程-按顺序输出ABCABC 多线程-按顺序输出ABCABC

巧妙方法1 利用数组的余数的特性
【多线程-按顺序输出ABCABC】public class Myprint3 { private int i = 0;

public static void main(String[] args) { Myprint3 myprint3 = new Myprint3(); new Thread(new Runnable() { @Override public void run() { while (true) { synchronized (myprint3){ if(myprint3.i%3==0){ System.out.println(Thread.currentThread().getName()+"A"); myprint3.myPirnt(); } } } } }).start(); new Thread(new Runnable() { @Override public void run() { while (true) { synchronized (myprint3){ if(myprint3.i%3==1){ System.out.println(Thread.currentThread().getName()+"B"); myprint3.myPirnt(); } } } } }).start(); new Thread(new Runnable() { @Override public void run() { while (true) { synchronized (myprint3){ if(myprint3.i%3==2){ System.out.println(Thread.currentThread().getName()+"C"); myprint3.myPirnt(); } } } } }).start(); }public void myPirnt() { i++; } 复制代码

}
常规方法使用三个信号量，开控制
public int i; public boolean a = true; public boolean b = false; public boolean c = false;

public static void main(String[] args) { Myprint myprint = new Myprint(); new Thread(new Runnable() { @Override public void run() { while (true) { synchronized (myprint) { while (myprint.a) { myprint.getAdd(); myprint.a=false; myprint.b=true; myprint.c=false; } } } } }).start(); new Thread(new Runnable() { @Override public void run() { while (true) { synchronized (myprint) { while (myprint.b) { myprint.getAdd(); myprint.a=false; myprint.b=false; myprint.c=true; } } } } }).start(); new Thread(new Runnable() { @Override public void run() { while (true) { synchronized (myprint) { while (myprint.c) { myprint.getAdd(); myprint.a=true; myprint.b=false; myprint.c=false; } } } } }).start(); }public void getAdd() { for (int j = 0; j < 5; j++) { i++; System.out.println(Thread.currentThread().getName()+i); } }复制代码

转载于:https://juejin.im/post/5cdd246ee51d456e79545d70